<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="js/vue.js"></script>
    <style>
        .inner{
            height: 150px;
            background-color: darkcyan;
        }
    </style>
</head>
<body>
    

    <div id="app">
        <h4>{{msg}}</h4>
        <input type="text" style="width: 100%" v-model="msg">
    </div>


    <script>
        var vm = new Vue({
            el:"#app",
            data:{
                msg : '大家都是好学生'
            }
        })
    </script>
</body>
</html>